HTML 5 Video

Code for Embedding video

Youtube or Vimeo:

Use the share button for youtube or vimeo files and choose embed. Copy the code to your page.

HTML 5 video tag with multiple sources:

This is the code used above.
This example does not use the codecs attributes and values which might not be absolutely necessary.
iphone is first and fallback text is last. Fallback files can also be flash video.